LG 42LC7D that has sound no picture. Performed the flashlight test - I do see picture in background assume bad inverter. How do I determine if slave/master is bad no evident damage either board

SOURCE: My Lg 42lc7d 42 inch flatscreen tv has no sound

1- check all the cables that are hooked up to the TV 2- try to get audio to and external speakers or home theater (to check the sound card). 3- if the step # 2 don't work either you have a bad sound board on your TV. 4- opn the TV try t get the part # of the board, and replace it

SOURCE: No Sound, No Picture on LG 42LC7D

I do not have a solution but I have the same situation with my tv

SOURCE: I have the exact same issue as the unsolved

The power on problem is a cap in the power on circuit. The loss of signal for an areal is delayed. Nothing you can for DIY.It needs repair shop visit.

SOURCE: LG 42LC7D.......Have sound but no

It sounds like you have a logic board problem. It is easy to fix open up your tv on the back and the logic board should be covered with a small metal plate unscrew the it, it uses small screws get the number of that board an order it through guytvparts.com is the cheapest

SOURCE: LG 42LC7D-UB, Bad LCD Controller Board????

Steve, that was awesome. Thanks a bunch. I already have the tools and I can get the solder easy enough. Thanks a again. I went to Best Buy this weekend and all they could say is that the entire board would need to be replace and that they really recommended a new tv as the cost for the new board would be as much as a new TV.... :( typical of them!